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Help me figure out this belt noise #4101661 05/20/16 08:13 AM
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Klutch9 Offline OP
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For about the past year, the belt on our Fusion makes a chirp on colder mornings. It's not a constant squeal, just a chirp. The noise is consistent with each rotation of the belt, so it seems like a portion of the belt may be glazed. This morning I started it up, chirping was there; I sprayed some water on the ribbed side of belt, and the noise instantly stopped. So it seems like a belt issue, but I'm wondering if the noise is a result of pulley misalignment?

I looked at each pulley while the engine was running, and I didn't see any wobble. I also looked along the length of the belt, and it seemed to run true. The tensioner pulley moved in and out a bit with RPM variation while the engine was warming up, but it was almost unnoticeable. I shut the engine off and tried wiggling each pulley by hand. All were rock solid. The are 2 plastic idler pulleys, which by nature will have more flex than a steel pulley, but both were solidly mounted with little flex.

FWIW, the one edge of the belt has the slightest amount of cord showing; maybe it rubbed on something?


'11 Fusion SE 2.5L - 83k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 129k miles - Havoline HM 5w20, Auto7 filter
Re: Help me figure out this belt noise [Re: Klutch9] #4101681 05/20/16 08:36 AM
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Nick1994 Offline
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At 5 years old, I wouldn't feel bad about replacing the belt. Then you'll know whether the noise is the belt or a pulley.


2015 Hyundai Sonata 2.4L 101k STP Synthetic HM 10w30 & OEM
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: Help me figure out this belt noise [Re: Nick1994] #4101687 05/20/16 08:44 AM
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Bgallagher Offline
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Originally Posted By: Nick1994
At 5 years old, I wouldn't feel bad about replacing the belt. Then you'll know whether the noise is the belt or a pulley.


+1 It isn't an expensive thing to replace and it'll help you better determine the noise. At the very least you wont have to think about a belt.


2017 Chevy Traverse - 28k - Delco Dexos 1 and PF63
2014 Chevy Equinox - 22k - Delco Dexos 1 and PF457G
2015 GMC Terrain - 22k- Delco Dexos 1 and PF457G
Re: Help me figure out this belt noise [Re: Klutch9] #4101811 05/20/16 10:36 AM
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HerrStig Offline
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Remove the belt and run the engine for a short listen.

Re: Help me figure out this belt noise [Re: Klutch9] #4101906 05/20/16 12:40 PM
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The_Eric Offline
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You likely have a pulley out of alignment. Gates sells this nifty little laser alignment tool that sets in the grooves of the pulleys to see which one is off. I know it can be found at NAPA.

Fix the alignment and put on a new belt- also check the tensioner and idlers.


2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M
Re: Help me figure out this belt noise [Re: The_Eric] #4102074 05/20/16 04:49 PM
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Klutch9 Offline OP
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I picked up a smooth idler pulley and a new auto-tensioner at NAPA today, just in case I need them when I swap the belt. The grooved idler pulley is special order, and the one on this car is quiet with no play anyhow, so I'm fine leaving it.

I noticed that the new tensioner (Gates) has the slightest amount of play in the pulley. I've heard this is normal, especially for a plastic pulley. Any ideas there? Box was sealed, so I know it wasn't tampered with.


'11 Fusion SE 2.5L - 83k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 129k miles - Havoline HM 5w20, Auto7 filter
Re: Help me figure out this belt noise [Re: Klutch9] #4102083 05/20/16 05:00 PM
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Rand Online Content
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gates pulleys can be cheapo Chinese.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Help me figure out this belt noise [Re: Rand] #4102087 05/20/16 05:06 PM
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Klutch9 Offline OP
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Originally Posted By: Rand
gates pulleys can be cheapo Chinese.


The tensioner was made in Korea. The idler pulley was made in Canada.


'11 Fusion SE 2.5L - 83k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 129k miles - Havoline HM 5w20, Auto7 filter
Re: Help me figure out this belt noise [Re: Klutch9] #4102335 05/20/16 10:22 PM
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The_Eric Offline
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Originally Posted By: Klutch9
Originally Posted By: Rand
gates pulleys can be cheapo Chinese.


The tensioner was made in Korea. The idler pulley was made in Canada.


But the important part, the bearing was made in China.


2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M
Re: Help me figure out this belt noise [Re: Klutch9] #4104534 05/23/16 04:39 PM
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SirTanon Offline
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The belt tensioners on the 2.5 engines in these cars are a known issue, and after a while (usually around 60,000 miles or so) start to make nose, and if left long enough, start making noise constantly.

The belt tensioner on mine was doing it the day I bought it, used, at just under 178,000 miles. Sounds a bit like the alternator is going.

Luckily, it's an easy fix if you have an hour or two. I fixed mine myself in about 75 minutes. The replacement part was $45.

Since yours is a chirp, and it's not constant, it may or may not be the tensioner. At 5 years, it could very well be the belt, but the mileage seems about right to potentially be the tensioner.


2013 Nissan Altima SV - 2.5 liter/CVT - 118,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 67,000mi
2010 Ford Fusion - 274,500mi
Re: Help me figure out this belt noise [Re: The_Eric] #4104805 05/23/16 10:39 PM
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The Critic Offline
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Originally Posted By: The_Eric
Originally Posted By: Klutch9
Originally Posted By: Rand
gates pulleys can be cheapo Chinese.


The tensioner was made in Korea. The idler pulley was made in Canada.


But the important part, the bearing was made in China.

Bingo.


2011 Toyota Prius 1.8L - 195K - Idemitsu ZEPRO Adv. Moly 0W-20
2007 Honda Accord 2.4 - 138K - Mobil 1 EP HM 5W-30
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